so literally all ford focus(es) (2000-2012) have the same transmission?

for what reasons are is the 03-04 my best bet, aside from you owning one?

All the MKI manuals have the mtx75 except the svt.

I only suggested '03-'04 because they are likely to have the lowest miles and are newer. As someone else mentioned, stay away from 00-01 because they tended to have more issues. 03 and older also had a lock

Also, the 2.3 dura in a MKI is extremely rare. It is highly unlikely you will find one.

I'd also be wary about buying an SVT simply due to the fact that they may be beat on.